Parker 252 Series, Owner'S Manual

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Bulletin HY25-1806-M1/US
Owner’s Manual
252 Series
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
14
PTO Installation
Allison 1000, 2000/2500
1. Remove PTO aperture plate from the transmission
(
Fig. 18).
WARNING: Oil may be hot. Use extreme caution
to ensure that you do not accidentally come in contact
with hot oil.
NOTE: Make sure aperture surface is clean and dry
before proceeding.
2. Install the proper studs (379428-14 furnished with
PTO) in the PTO aperture pad. The stud kit
furnished with the PTO contains five (5) studs
and one (1) cap screw and have pre-applied locking/
sealing compound. Do not install a stud in the
top hole on the aperture pad, this is for the
cap screw (See
Fig. 19) for proper placement
of studs. Tighten studs securely and torque to
17-19 lbs-ft (23-25 Nm).
CAUTION: Over tightening of studs may damage stud
and/or transmission threads.
3. Place the gasket (35-P-41) provided with the
PTO over the studs (
Fig. 20). Only one
gasket is required because the 252 Series
PTO does not require the backlash to be set.
4. Secure the PTO & Pump to the transmission.
Install the long bolt to the top hole in the PTO
and the flange nuts (provided with the PTO) to
the studs ( Fig. 21).
NOTE: Flange nuts do not require lock washers.
5. Fasten the Power Take-Off to the transmission.
Torque the five (5) flange nuts (379744) to
35-40 lbs-ft [47-54 Nm].
Torque the cap screw (379578-48) to 30-35 lbs-ft
[41-47 Nm].
Fig. 18
Fig. 21
Fig. 19
Fig. 20
This symbol warns of possible personal injury.
Allison Installation